WO2009014319A1 - Method for updating firmware of sensor nodes on the wireless sensor network - Google Patents

Method for updating firmware of sensor nodes on the wireless sensor network Download PDF

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Publication number
WO2009014319A1
WO2009014319A1 PCT/KR2008/003551 KR2008003551W WO2009014319A1 WO 2009014319 A1 WO2009014319 A1 WO 2009014319A1 KR 2008003551 W KR2008003551 W KR 2008003551W WO 2009014319 A1 WO2009014319 A1 WO 2009014319A1
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WO
WIPO (PCT)
Prior art keywords
firmware
nodes
node
update
transmission
Prior art date
Application number
PCT/KR2008/003551
Other languages
English (en)
French (fr)
Inventor
Tae-Yun Chung
Hyung-Bong Lee
Dae-Il Kim
Original Assignee
Kangnung National University Industriel Academy Corporation Group
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kangnung National University Industriel Academy Corporation Group filed Critical Kangnung National University Industriel Academy Corporation Group
Priority to US12/670,314 priority Critical patent/US8572600B2/en
Publication of WO2009014319A1 publication Critical patent/WO2009014319A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0803—Configuration setting
    • H04L41/0813—Configuration setting characterised by the conditions triggering a change of settings
    • H04L41/082—Configuration setting characterised by the conditions triggering a change of settings the condition being updates or upgrades of network functionality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0866—Checking the configuration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks

Definitions

  • the present invention relates, in general, to a method for updating the firmware of a plurality of nodes in a wireless sensor network, and, more particularly, to a method of updating the firmware of a plurality of sensor nodes without performing a process of collecting or reinstalling the sensor nodes.
  • a Ubiquitous Sensor Network means a network system which processes and manages information by constituting a wireless sensor network using a plurality of sensor nodes each including a sensor capable of detecting information about recognition of objects or information about peripheral environments, and by connecting information, input through various sensors, to the outside in real time over a network.
  • the USN ultimately provides all objects with computing and communication functions, thereby aiming at realizing an environment in which communication can be performed regardless of the type of network, device, or service, anytime and anywhere.
  • the general construction of the USN includes a plurality of sensor nodes, each of which is configured to include a communication module and a sensor for detecting information about recognition of objects or information about peripheral environments, sensor fields, each of which is provided with a set of sensor nodes, a sink node, which is configured to receive information collected from the sensor fields, and a gateway, which is configured to route information received from the sink node and then transmit the routed information to a management server over a broadband network.
  • the sink node can be connected to the gateway using an existing infrastructure such as satellite communication, a wireless Local Area Network (LAN) , Bluetooth, and the wired Internet.
  • the USN can be used to detect the fact that a disaster has occurred and manage the disaster when a disaster, such as a fire, a flood, or an earthquake, occurs .
  • an object of the present invention is to provide a method of conveniently updating the firmware of sensors without performing a process of collecting sensors installed over a wireless sensor network.
  • the present invention provides a method for updating firmware of a plurality of nodes constituting a wireless sensor network, including a server, a gateway and the plurality of nodes, the method including transmitting firmware to be updated from the server through the gateway to an uppermost node; sequentially transmitting the firmware to the plurality of nodes from the uppermost node to a lowermost node using wireless communication, and the respective nodes, which have received the firmware, recording the firmware in their own memory; and when the recording of the firmware is completed in all the nodes, running the boot programs of the respective nodes and recording the firmware, stored in the memory, in program memory, executing the firmware recorded in the nodes, and the nodes constituting a new network while communicating with peripheral nodes .
  • the server acquires and stores the depth information of the lowermost node before transmitting the firmware to be updated, acquires the depth information of a lowermost node of a network newly constructed after the update of the firmware is completed in all the nodes, compares the depth information of the lowermost node, which is acquired before the update, with the depth information of the lowermost node, which is acquired after the update, and verifies that the update is completed if the depth information, which is acquired before the update, is identical to the depth information, which is obtained after the update.
  • each of the nodes which constitutes the wireless sensor network has a transmission interval, a reception interval and a sleeping interval so as to transmit and receive data; and an upper node transmits a data packet, providing notification of transmission of the firmware, during the transmission interval thereof, and a lower node receives the firmware from the upper node during the sleeping interval thereof when the data packet, providing notification of transmission of the firmware, is received from the upper node during the reception interval of the lower node.
  • each of the boot programs boots each of the nodes by sequentially performing: (a) if an update__flag is set to >r True' , reading firmware previously stored in the memory and recording it in the program memory; (b) if the update_flag is not set to ⁇ True' and connection to an external firmware downloader is made, receiving firmware from the firmware downloader, and recording the received firmware in the program memory; and (c) executing the application program of the firmware recorded in the program memory.
  • firmware can be replaced without collecting a plurality of nodes installed in a wireless sensor network. Further, according to the present invention, the firmware of each of the nodes can be easily and rapidly replaced by wirelessly transmitting/receiving data, so that the addition and maintenance of functions are easy.
  • FIG. 1 is a flowchart showing a method of updating the firmware of nodes according to a preferred embodiment of the present invention
  • FIG. 2 is a flowchart showing a process of transmitting firmware between a gateway and a sink node in an update method according to a preferred embodiment of the present invention
  • FIG. 3 is a flowchart showing a process of transmitting firmware to respective nodes in the update method according to the preferred embodiment of the present invention
  • FIG. 4 is a flowchart showing a transmission process in the case in which firmware transmission fails
  • FIG. 5 is a flowchart sequentially showing a process of a transmission node making an attempt to access a reception node and then performing synchronization according to a preferred embodiment of the present invention
  • FIG. 6 is a flowchart sequentially showing a process of transmitting data between the transmission node and the reception node, which are synchronized with each other, according to a preferred embodiment of the present invention.
  • FIG. 7 is a flowchart sequentially showing the operation of the boot programs of each of the nodes in the update method according to the preferred embodiment of the present invention.
  • FIG. 1 is a flowchart totally showing a method of updating the firmware of a plurality of nodes according to a preferred embodiment of the present invention.
  • a gateway transmits firmware to be updated to a sink node through RS232C at step 10.
  • the firmware is sequentially transmitted to a plurality of nodes, that is, from the sink node to a terminal node using wireless communication at step 20.
  • the respective nodes which have received the firmware from each of their upper nodes, record the corresponding firmware in their memory.
  • the respective nodes perform reboot and then run the boot programs thereof at step 40.
  • the boot program of each of the nodes records the firmware, stored in the memory through the above-described process, in program memory at step 50
  • the boot program executes the recorded firmware at step 60. Due to the execution of the updated firmware, each node constitutes a new network by communicating with the peripheral nodes thereof again, so that the node completes the update of the firmware .
  • firmware installed in a plurality of nodes can be replaced without a user performing a process of collecting and reinstalling the plurality of nodes which has been already installed, and the firmware can be easily and rapidly replaced, so that the addition and maintenance of functions become easy.
  • the above-described respective steps will be described in further detail.
  • FIG. 2 is a flowchart showing the process of transmitting firmware between a gateway and a sink node in the update method according to the present invention.
  • a gateway transmits a CP#1, requesting the start of transmission of firmware, to the sink node at step 200.
  • the CP#1 includes information about firmware size.
  • the sink node receives the CP#1, the sink node transmits a CP#2, approving the start of transmission, to the gateway at step 210.
  • the gateway transmits a firmware data packet DP#n to the sink node at step 220.
  • the DP#n is one packet obtained by dividing the firmware into n parts.
  • the sink node transmits a CP#3, which is an ACK packet for the DP#n, to the gateway at step 230.
  • the CP#3 includes ⁇ n' information about the received firmware packet.
  • the steps 220 and 230 are repeated until all of the firmware packets DP#1 to DP#n are transmitted at step 240.
  • the gateway transmits a CP#4 providing notification that all of the firmware packets have been transmitted to the sink node at step 250.
  • the sink node compares information about the total size of the firmware, included in the CP#1, with information about the total size of the received firmware packets DP#1 to DP#n, and then transmits a CP#5 providing notification of whether the transmission is successful to the gateway at step 260.
  • FIG. 3 is a flowchart showing a process of transmitting firmware to each of the nodes in the update method according to the present invention.
  • FIG. 4 is a flowchart showing a transmission process in the case in which firmware transmission fails .
  • TDMA linear network to which the update method according to the present invention is applied, a plurality of sensor nodes is linearly connected to each other.
  • the sink node which is the uppermost node, transmits/receives data to/from the gateway, and a plurality of nodes is linearly connected between the sink node and the terminal node, which is the lowermost node. Further, each of the nodes repeatedly includes a transmission interval for transmitting data, a reception interval for receiving data, and a sleeping interval for sleeping without transmitting data.
  • an upper node transmits a CP#6 to a lower node so as to provide notification that firmware will be transmitted during a sleeping interval at step 300.
  • the lower node which has received the CP#6, does not enter a sleeping state so as to receive firmware during the sleeping interval.
  • the lower node transmits a CP#7 to a sink node, which is the uppermost node, at step 310.
  • the CP#7 includes information about the unique ID and network depth of the lower node, and the CP#7 is transmitted to a server, thereby informing a manager of information about the details of transmission of the current firmware.
  • the lower node If the lower node fails to receive the firmware from the upper node during the sleeping interval, the lower node transmits a CP#10 to the uppermost node (sink node, refer to FIG. 4) .
  • the CP#10 includes information about the unique ID and network depth of the lower node. If one or more upper nodes, which have received the firmware, receive the CP#10, a firmware transmission completion state is released. The CP#10 is transmitted to the server, thereby informing a manager of the failure of the transmission of the current firmware.
  • the lowermost node transmits a CP#8 to the uppermost node (sink node) , thereby providing notification that the transmission of the firmware to all of the nodes of the network has been completed.
  • the CP#8 is transmitted to the server, thereby informing a manager that the transmission of the firmware to all of the nodes in the network has been completed.
  • the uppermost node (sink node) , which has received the CP#8, transmits a CP#9, requesting reboot, to the lower nodes.
  • FIG. 5 is a flowchart sequentially showing a process of a transmission node making an attempt to access a reception node and then performing synchronization according to the present invention.
  • a reception node operates the wait timer of a transmission node, and waits for access at step 500.
  • the transmission node operates the wait timer so as to make an attempt to access the reception node and transmits an NPDU#1 at step 510.
  • the NPDU#1 includes data size.
  • the reception node receives the NPDU#1
  • the reception node transmits an NPDU#2, including the size of a receivable packet and the number of receivable packets, which are taken as defaults, to the transmission node at step 520.
  • the reception node cannot receive the NPDU#1 and the wait timer is terminated, the reception node is reset at step 522.
  • the transmission node When the transmission node receives the NPDU#2, the transmission node sets the size of a receivable packet and the number of receivable packets, transmits an NPDU#3 to the reception node, and then operates the wait timer at step 530. If the transmission node cannot receive the NPDU#2, the transmission node transmits the NPDU#1 again. Here, in the case in which the wait timer is terminated, the transmission node abandons a synchronization step and is then reset at step 532.
  • the reception unit receives the NPDU#3
  • the wait timer is terminated and the synchronization step is terminated at step 540.
  • the reception unit transmits the NPDU#2 again and then waits for the NPDU#3.
  • the reception unit abandons the synchronization step and is then reset at step 542.
  • the steps 530 and 532 are performed again. Otherwise, the wait timer is terminated and then the synchronization step is terminated at step 550.
  • FIG. 6 is a flowchart sequentially showing the process of the transmission node and the reception node, which are synchronized with each other, transmitting data according to the present invention.
  • the transmission node and the reception node are synchronized with each other. Therefore, the process proceeds in the state in which a TX interval and an RX interval are coupled with each other.
  • the transmission node transmits an APDU#n while repeating the TX interval a number of times corresponding to the number of receivable packets.
  • the APDU includes a packet number and actual data, and the size of the actual data is identical to the size of a receivable packet.
  • the reception node receives the APDU#n while repeating the RX interval a number of times corresponding to the number of receivable packets.
  • the state changes to an RX interval, and the transmission node waits for a response from the reception node.
  • the reception node transmits an NPDU#4 to the transmission node.
  • the NPDU#4 includes a received packet number and the number of receivable packets, calculated based on the transmission rate. If the reception node fails to receive the APDU#n, Timer_Count decreases by 1. When Timer_Count is 0, the reception node abandons the reception of data and is then reset.
  • the transmission node receives the NPDU#4, the transmission node records a packet number to be transmitted next, and then sets the number of receivable packets. If the transmission node fails to receive the NPDU#4, Timer_Count decreases by 1. When Timer_Count is 0, the transmission node abandons the transmission of data and is then reset. Thereafter, the above-described steps are repeated until all data are transmitted.
  • FIG. 7 is a flowchart sequentially showing the operation of the boot program.
  • a boot program is executed.
  • an update_flag is checked at step 700.
  • a firmware update step is performed, and when the update__flag is not set to ⁇ True' , a general boot step is performed.
  • the firmware update step includes the following process. First, data about firmware is read from memory, in which new firmware is recorded, at step 710, and then the data is recorded in program memory at step 712.
  • an update completion flag is set up at step 714, the node waits a predetermined time based on depth information, which is the network location information of the node itself, at step 716, and then executes the program of the newly updated firmware at step 730.
  • the general boot step includes the following process. First, it is determined whether connection to an external firmware downloader, such as a computer, has been made at step 720. If connection to the downloader has been made, firmware is received from the downloader and the received firmware is recorded in program memory at step 722, and then a corresponding program is executed when the firmware is completely recorded at step 730. If connection to the downloader has not been made, an existing program recorded in the program memory is executed at step 730.
  • the lowermost node of a network transmits its depth information to the server at predetermined time intervals.
  • the server receives the depth information of the lowermost node and recognizes the number of nodes in the current network. Meanwhile, before the server performs update for the firmware of the respective nodes, the server records the newest depth information and then transmits the firmware.
  • the nodes When update is performed using new firmware, the nodes, which constitute a network by executing the updated firmware, transmit their depth information to the server.
  • the server compares depth information, which is obtained before the firmware is transmitted, with the depth information of the node, which is obtained after the firmware is transmitted, in the network which is newly constituted. If the depth information, which is obtained before update is performed, is identical with the depth information, which is obtained after the update is performed, it is determined that the number of network nodes, obtained before the update is performed, is identical to the number of nodes, obtained after the update is performed, thereby verifying that the construction of the network using the new firmware is completed.
  • the method according to the present invention relates to a method of updating a plurality of sensor nodes which constitutes a wireless sensor network or a ubiquitous sensor network, and can be widely used in a wireless sensor network field, or a ubiquitous sensor network field, which includes the plurality of sensor nodes, which are scattered in various areas.
PCT/KR2008/003551 2007-07-26 2008-06-23 Method for updating firmware of sensor nodes on the wireless sensor network WO2009014319A1 (en)

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US12/670,314 US8572600B2 (en) 2007-07-26 2008-06-23 Method for updating firmware of sensor nodes on the wireless sensor network

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KR10-2007-0075207 2007-07-26
KR20070075207 2007-07-26
KR10-2007-0084768 2007-08-23
KR1020070084768A KR100862971B1 (ko) 2007-07-26 2007-08-23 무선 센서 네트워크의 노드들에 대한 펌웨어 업데이트 방법

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